Question

what is combustion and non Combustible​

Answer 1

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Here's your answer

Combustion is the burning of a substance in order to produce heat and light.

OR

Combustion is a chemical change during which an element or a compound reacts with oxygen and produces carbon dioxide and water vapors.

Combustible substance⇒ Substances that can catch fire or burn easily.

Non-combustible substance⇒ Substances that do not burn or catch fire easily in the presence of air.

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Answer 2

Answer:

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Combustion => Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. 

Non Combustion => incapable of igniting and burning when subjected to fire : not combustible noncombustible materials drums of noncombustible waste.

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